Annealing pot



Nov. 11, 1931. c, AFINN 1,832,197

' ANNEALING POT Filed Nov. 3, 1930 Z 2 Z jnvamior (ZarZeflZzLnn,

fly M Q CHARLES A. stint; or Racine, Wisconsin, AssIeNoR T BELLECITY'MALLEABLE mon Patented Nov. 17, 1931 a s'rarss PATENT OFFICECOMPANY, OF RACINE, WISCONSIN, A CORPORATION OF \VISCONSIN ANNEALINGPetr .Applicatio nfiled November s, 1930. Serial No. 492,390.

The invention is in an annealing pot. Such pots usually are rectangularand boxshaped, the same in practice being loaded with parts to beannealed. To enable stack-v ing ofthese pots in tiers within a kiln,they are so constructed that the bottom of one pot may fit into the topof another pot. This sacking imposes considerable weight on the wallsand corners of the pots.

Combined with this is the deleterious action of fire to which the potsare exposed,

causing oxidization and gradually weaken ing of the walls and cornerswhich eventually results in outward warping or bulging of the walls tosuch an extent that they can no longer be stacked. As continued use ofdistorted pots is out of the question considerable expense is involvedin the frequent pot replacements necessitated.

The primary objects of this invention are to construct these annealingpots in such a inanneras-to carry the weight of stacked pots throughstrengthened corner structure in each pot, combined with means relievingthe walls of all load carrying duty, such means furthermore to impose aresistance which will tend to thwart pot distortion, and thus maintainthe original rectangularityof the pots.

Such desirable objects are achieved in the practicable form of theinvention herein selected for purposes of illustration, in which 7 eachpct 18 rectangularly shaped with a thickening at the inside of eachcorner of the ots which thickenin in effect constitutes 7 O a post orcolumn. Such corn'ercolumns, however, do not extend abovethe side wallsof the pot and preferably are cut off flush with such walls at theirupper ends. Each top end of such column is then formed with a depressionwhich is relatively smaller than the top area of said column andsubstantially centrally disposed thereon. Next the bottom. of each potat its corners is formed w th a short I protruded boss or leg adapted,to seat in the depressions mentioned when stacking the pots. Thearrangement will be such that the weight will be carried by the. cornercolumns entirely independent of thewalls of the pots. Further, the legsand depressions are interlocked thereby tying the pots toor columnsalongthe horizontal section line l4 appears ing in Figure 2, toshow acorner;

Figure 5 is'an-enlarged sectional view'to illustrate thepot interlock asseen alongtheline 5-5, as shown in Figure 3; and,

Figure 6 1S a'horizontal sect onalview of line 6-6, appearing inFigure2.

In practice the potmay be made as an integral casting in rectangularshape with vertical side wallslO and vertical end walls 11. A raisedbottom 12 is included in the pot, the same being inwardly and upwardlybowed to truss and strengthen the same. I An outwardly and upwardlyflared flange 13 is formed around the top side of the pot whereby onepot'may be telescoped part way and set into another pot for stacking thesame ina tier, as shown in Figure 1. 'Trunnions 14 are arranged atdiagonally opposed cor- 11ers to facilitate handling of the pots;

These pots in use carry heavy loads and are exposed to fire and hightemperatures. Such exposure by a process of oxidation causes scaling offof the potswhich thins and weakens the wallsthereof. Obviously, then,

it is desirable to relieve these walls of all weight carrying duty toprevent bulging and distortion'of the potsgthereby insuring at .alltimesand regardless of the reasonablev number of heats to which they havebeen subjected, that they will and canjbeproperly stacked in tiers.

Insolving this problem each inside corher of thepot is formed with asubstantial comprising vertical corner posts thickening Whose top endspresent arelatively large fiat'area 16 that lies'flush with pots as seenalong the the same'interlock detail, as seen along the V the top line ofthe walls and 11 inwardly of and lower than the flared flange 13.

Formed substantially centrally on each side area or surface 16 is arounded, relatively small, depression 17. These posts or columns 15extend downwardly and at their lower ends are cut oil or formed fiat andflush with the bottom line of the walls 10 and 11, as shown best inFigures 2 and 5. Protruding downwardly and centrally from the bottom endof each post 15 is a short elongated boss or leg 18, each such bosshaving a lower, rounded, end curved on a radiusless than the radius ofcurvature of the depressions 17.

Now then, when stacking two pots as shown in Figures 1, 2 and 5 thebosses or legs 18 will register with and lit in the depressions 17 in' amanner to transmit all load through the superimposed posts 15 therebyrelieving the side and end walls 10 and 11 of any strain tending tobulge the walls.

Further these legs and depressions interlock in such a way as tobuild upa resistance against forces actlng to destroy the rece tangularity ofthe pots. By having the difference in curvatures "described in the dc:pressions and legs it is found these legs or bosses guide more easilyinto the depressions and better find their seats. Also enough clearanceis provided to compensate for expansion and contraction therebyeliminating cramping. The bosses also serve as legs when standing a poton. the floor or ground. When dumping a pot,,,it isupended and thereforeany dirt accumulations.which may have formed in the depressionsautomatically' clean out. Consequently no problem in connection withchoked up depressions is presented. i

In conclusion, it must now be apparent that an improved annealing pothas been provided which achieves the objects heretofore set forth.

It is the intention to cover herein all such changes and modificationsof the example herein disclosed as do not constitute a d eparture fromthe spirit and scope of the invention as expressed in. the followingclaims.

That is claimed is: i 1. An annealing pot-having a. bottom and 7connected side and end walls, vertical posts formed in the cornersbetween eachside and end wall, each said post terminating at its upperend in a fiat area substantially flush with the top edges of theadjacent walls, said area having substantially centrally formedtherein adepression, and a downwardly pro- 7 truding boss at. each bottom.corner,1 said pendently of and to relieve the walls and to interlock thecorners whereby to. resist distortion of the walls.

'2. An annealing pot, having connected ing formed therein a relativelysmall de-.

pression, and a downwardly protruding boss at the bottom end of eachpost, said bosses adapted to register in similar depressions of 'anadjacent pot when stacked to transmit the load through the postsindependently of and to relieve the walls and to interlock the corners,obviating distortion of the walls out of their rectangular form.

3. An annealing pot having connected side and end walls in rectangularform, a bottom, apost formed in each corner of the pot, the upper endsof the posts presenting flat areas substantially flush with the topedges of the walls, the fiat areas each formed with a relatively smalldepression, and the. bottom of each post having a boss so projectingbelow the bottom as to enter a corresponding depression in a pottherebelow.

4. An annealing pot having connected side and end walls in rectangularform, a bottom, a post formed in each corner of the pot, the upper endsof the posts each presenting a flat area substantially flush with thetop edges of the walls, the flat areas each formed with a relativelysmall rounded depression, and the bottom of each post having a bossprojected below the bottom, the lower ends of said bosses being roundedto seatin complementary similar depressions formed in an adjoiningstacked pot.

5. An annealing pot having connected side and end walls in rectangularform, a bottom, a post'formed in each corner of the pot, the upper endsof the posts each presenting a fiat area substantially flush with thetop edges of the walls, the flat areas each formed with a relativelysmall rounded depression, and the bosses adapted to register in similardepres- V

